离散时空中的费米子系统--因果结构的自发产生
Fermion Systems in Discrete Space-Time Exemplifying the Spontaneous Generation of a Causal Structure
摘要：
作为普朗克尺度上的时空玩具模型，我们考虑离散时空中的费米子系统的例子，这些系统由定义在两个到九个时空点上的一个或两个粒子组成。我们研究的自组织粒子所描述的变分原理分析和数值。我们发现了一种自发对称性破缺效应，它导致了离散因果结构的出现。
英文摘要：
As toy models for space-time on the Planck scale, we consider examples of fermion systems in discrete space-time which are composed of one or two particles defined on two up to nine space-time points. We study the self-organization of the particles as described by a variational principle both analytically and numerically. We find an effect of spontaneous symmetry breaking which leads to the emergence of a discrete causal structure.
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